This streamlined second layer provides fitted performance shaping without the squeeze of compression. Mesh underarm panels provide strategic ventilation to keep you cool while Under Armour's Signature Moisture Transport System manages moisture and odour to maximise comfort._Sleek technical performance long sleeve tee from Under ArmourHeatGear Sonic compression - creates an ultra-light fit which wears like a second skin to deliver a locked-in feel that keeps your muscles fresh and enhances your recovery time without the squeeze of compression.Ultra-soft, smooth fabric layer - blends polyester with elastane to offer an incredibly comfortable fit with very little weight.4 way stretch fabric - retains its shape well whilst promoting free-movement.Mesh underarm panels - aid airflow to ensure that you remain well ventilated and cool.Signature Moisture Transport System - effectively wick sweat away from the skin to improve comfort and fit.Anti-odour technology - prevents the growth of odour-causing microbes to increase freshness.Smooth, chafe-free flatlock seam construction with engineered mesh neck - designed to create a comfortable fit which does not rub against the skin or cause discomfort when active.30+ UPF - protection from the sun's harmful UV rays